The occurrence of infestation of parasitic isopods in brackish water ponds for bangos (Chasms chanos Forskal) has been noted in Central Luzon.
Sometime during the rainy season in 1958, attention was called to the occurrence of swarms of crustacean ectoparasites in a baiigos fishpond in Dampalit, Malabon, Rizal. A few specimens were submitted to this Office, and review of literature, revealed that they were isopods.
In 1962, an infestation was reported by the District Fishery Officer of Pangasinan in barigos fishponds in Binmaley, Pan- gasinan. The parasite was first observed just after the floods caused by Typhoon Kate, one of the worst that struck Luzon sometime in August, 1962. Specimens were collected by fishpond caretakers and were sent to this Office but were not saved. Some observations were made of the salinity which was at zero and the water temperature at 31.5°C.
The third report was made by Mr. Roman Abalos of Maligaya Experimental Station, Munoz, Nueva Ecija, who brought 28 specimens, ranging from 7.0 to 10.0 mm. in length, also from Binmaley, Pangasinan, collected on October 21, 1962.